Vanishing Letters
Simon’s way to celebrate Helloween: a little demo about how red marker reflects red LED light and becomes invisible. A nice trick in the dark! We also had so much … Continue reading Vanishing Letters
Tag: LED
Physics Experiments: Using an LED backwards
We have tried using an LED backwards: not get it to shine by letting an electric current pass through it but produce electricity by shining light on an LED (this … Continue reading Physics Experiments: Using an LED backwards
Geeks out of the box 